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          <h1 class="post-title" itemprop="name headline">时间的处理</h1>
        

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        <h2 id="JavaScript中的时间处理"><a href="#JavaScript中的时间处理" class="headerlink" title="JavaScript中的时间处理"></a>JavaScript中的时间处理</h2><h3 id="Js获取当前日期时间及其它操作"><a href="#Js获取当前日期时间及其它操作" class="headerlink" title="Js获取当前日期时间及其它操作"></a>Js获取当前日期时间及其它操作</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br></pre></td><td class="code"><pre><span class="line">var myDate = new Date();</span><br><span class="line">myDate.getYear();        //获取当前年份(2位)</span><br><span class="line">myDate.getFullYear();    //获取完整的年份(4位,1970-????)</span><br><span class="line">myDate.getMonth();       //获取当前月份(0-11,0代表1月)</span><br><span class="line">myDate.getDate();        //获取当前日(1-31)</span><br><span class="line">myDate.getDay();         //获取当前星期X(0-6,0代表星期天)</span><br><span class="line">myDate.getTime();        //获取当前时间(从1970.1.1开始的毫秒数)</span><br><span class="line">myDate.getHours();       //获取当前小时数(0-23)</span><br><span class="line">myDate.getMinutes();     //获取当前分钟数(0-59)</span><br><span class="line">myDate.getSeconds();     //获取当前秒数(0-59)</span><br><span class="line">myDate.getMilliseconds();    //获取当前毫秒数(0-999)</span><br><span class="line">myDate.toLocaleDateString();     //获取当前日期</span><br><span class="line">var mytime=myDate.toLocaleTimeString();     //获取当前时间</span><br><span class="line">myDate.toLocaleString( );        //获取日期与时间</span><br></pre></td></tr></table></figure>
<ul>
<li>这些方法获取到的是数字，要显示的话要使用<code>.toString()</code>转换成字符串  。</li>
<li>获取当前月份，需要<code>myDate.getMonth() - 1</code>。  <a id="more"></a>
</li>
</ul>
<h4 id="定义日期"><a href="#定义日期" class="headerlink" title="定义日期"></a>定义日期</h4><p>Date 对象用于处理日期和时间。<br>可以通过 new 关键词来定义 Date 对象。以下代码定义了名为 myDate 的 Date 对象：<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">var myDate=new Date()</span><br></pre></td></tr></table></figure></p>
<blockquote>
<p><strong>注释</strong>：Date 对象自动使用当前的日期和时间作为其初始值。  </p>
</blockquote>
<h4 id="操作日期"><a href="#操作日期" class="headerlink" title="操作日期"></a>操作日期</h4><p>通过使用针对日期对象的方法，我们可以很容易地对日期进行操作。<br>在下面的例子中，我们为日期对象设置了一个特定的日期 (2008 年 8 月 9 日)：<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">var myDate=new Date()</span><br><span class="line">myDate.setFullYear(2008,7,9)</span><br></pre></td></tr></table></figure></p>
<blockquote>
<p><strong>注意</strong>：表示月份的参数介于 0 到 11 之间。也就是说，如果希望把月设置为 8 月，则参数应该是 7。</p>
</blockquote>
<p>在下面的例子中，我们将日期对象设置为 5 天后的日期：<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">var myDate=new Date()</span><br><span class="line">myDate.setDate(myDate.getDate()+5)</span><br></pre></td></tr></table></figure></p>
<blockquote>
<p><strong>注意</strong>：如果增加天数会改变月份或者年份，那么日期对象会自动完成这种转换。</p>
</blockquote>
<h3 id="比较日期（计算年龄）"><a href="#比较日期（计算年龄）" class="headerlink" title="比较日期（计算年龄）"></a>比较日期<small>（计算年龄）</small></h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line">let nowDate=new Date();//当前时间</span><br><span class="line">let myDate=new Date();</span><br><span class="line">myDate.setFullYear(myYear,myMonth-1,myDay);//出生时间</span><br><span class="line">let newDate=nowDate.getTime()-myDate.getTime();//时间差（单位：毫秒）</span><br><span class="line">// 向下取整  例如 10岁 20天 会计算成 10岁</span><br><span class="line">// 如果要向上取整 计算成11岁，把floor替换成 ceil</span><br><span class="line">var age = Math.ceil(newDate / 1000 / 60 / 60 / 24 /365);</span><br><span class="line">if (isNaN(age))&#123;</span><br><span class="line">    age = &quot;&quot;;</span><br><span class="line">&#125;</span><br><span class="line">return age;</span><br></pre></td></tr></table></figure>
<h3 id="把时间戳转换为日期"><a href="#把时间戳转换为日期" class="headerlink" title="把时间戳转换为日期"></a>把时间戳转换为日期</h3><p>得到后台从数据库中拿到的数据我们希望格式是  <code>2016年10月25日 17时37分30秒</code>　或者 <code>2016/10/25 17:37:30</code></p>
<p>然而我们前台得到的却是一段数字（时间戳，毫秒数）  <code>1477386005</code></p>
<p>我们要将时间戳转化为我们想要的格式。  </p>
<p>核心方法 ：</p>
<blockquote>
<p>1477386005是我从后台得到时间戳 （注意：有的时候得到的时间戳是已经乘以1000的）<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">var unixTimestamp = new Date( 1477386005*1000 ) ; //转化时间戳</span><br><span class="line">commonTime = unixTimestamp.toLocaleString(); //获得日期</span><br><span class="line">alert(commonTime);</span><br></pre></td></tr></table></figure></p>
</blockquote>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">/*数字是个位，前面补足0*/</span><br><span class="line">function formatTime(num)&#123;</span><br><span class="line">    if(num&lt;10)</span><br><span class="line">    return &apos;0&apos;+num</span><br><span class="line">    else</span><br><span class="line">    return num+&apos;&apos;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p>但是我希望转换为我自己想要的格式，就在本页面重写一下 toLocaleString()方法即可。<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line">Date.prototype.toLocaleString = function() &#123; </span><br><span class="line">	var getFullYear=formatTime(this.getFullYear());</span><br><span class="line">    var getMonth=formatTime(this.getMonth() + 1);</span><br><span class="line">    var getDate=formatTime(this.getDate());</span><br><span class="line">    var getHours=formatTime(this.getHours());</span><br><span class="line">    var getMinutes=formatTime(this.getMinutes());</span><br><span class="line">    var getSeconds=formatTime(this.getSeconds());</span><br><span class="line">	return getFullYear + &quot;年&quot; + getMonth + &quot;月&quot; + getDate + &quot;日 &quot; + getHours + &quot;点&quot; + getMinutes + &quot;分&quot; + getSeconds + &quot;秒&quot;; </span><br><span class="line">&#125;;</span><br></pre></td></tr></table></figure></p>
<p>或者用函数实现  </p>
<pre><code>const formatTime = date =&gt; {
  const year = date.getFullYear()
  const month = date.getMonth() + 1
  const day = date.getDate()
  const hour = date.getHours()
  const minute = date.getMinutes()
  const second = date.getSeconds()
  //.map()返回一个新数组
  return [year, month, day].map(formatNumber).join(&apos;/&apos;) + &apos; &apos; + [hour, minute, second].map(formatNumber).join(&apos;:&apos;)
}
//个位数补零
const formatNumber = n =&gt; {
  n = n.toString()
  //判断字符串是否有两个，否则补零
  return n[1] ? n : &apos;0&apos; + n
}
</code></pre><h3 id="计时器"><a href="#计时器" class="headerlink" title="计时器"></a>计时器</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br></pre></td><td class="code"><pre><span class="line">var t;</span><br><span class="line">var seconds;</span><br><span class="line">/*计时器*/</span><br><span class="line">function timing()&#123;</span><br><span class="line">    seconds = 0;</span><br><span class="line">    if (seconds &gt; 21599) &#123;</span><br><span class="line">      let time = &apos;6小时，不想继续了gg&apos;</span><br><span class="line">      return;</span><br><span class="line">    &#125;</span><br><span class="line">    t = setTimeout(function()&#123;</span><br><span class="line">        seconds=seconds+1;</span><br><span class="line">        timing();</span><br><span class="line">    &#125;,1000);</span><br><span class="line">    formatSeconds(seconds);</span><br><span class="line">&#125;</span><br><span class="line">/*输出计时文字*/</span><br><span class="line">function formatSeconds(seconds)&#123;</span><br><span class="line">    var mins=0,hours=0,time=&apos;&apos;;</span><br><span class="line">    if(seconds&lt;3600)&#123;</span><br><span class="line">      mins = parseInt(seconds /60)</span><br><span class="line">      seconds=seconds%60</span><br><span class="line">    &#125;else&#123;</span><br><span class="line">      mins=parseInt(seconds/60)</span><br><span class="line">      seconds=seconds%60</span><br><span class="line">      hours=parseInt(mins/60)</span><br><span class="line">      mins=mins%60</span><br><span class="line">    &#125;</span><br><span class="line">    time=formatTime(hours)+&apos;:&apos;+formatTime(mins)+&apos;:&apos;+formatTime(seconds);</span><br><span class="line">    return time;</span><br><span class="line">&#125;</span><br><span class="line">/*数字是个位，前面补足0*/</span><br><span class="line">function formatTime(num)&#123;</span><br><span class="line">    if(num&lt;10)</span><br><span class="line">    return &apos;0&apos;+num</span><br><span class="line">    else</span><br><span class="line">    return num+&apos;&apos;</span><br><span class="line">&#125;</span><br><span class="line">/* 停止计时 */</span><br><span class="line">function stopCount()&#123;</span><br><span class="line">    clearTimeout(t);</span><br><span class="line">    console.log(&apos;结束游戏，游戏时长为：&apos;,seconds,&apos;秒&apos;);</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<h3 id="倒计时（目前能用，还需改进）"><a href="#倒计时（目前能用，还需改进）" class="headerlink" title="倒计时（目前能用，还需改进）"></a>倒计时<small>（目前能用，还需改进）</small></h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br></pre></td><td class="code"><pre><span class="line">/*数字是个位，前面补足0*/</span><br><span class="line">function formatTime(num)&#123;</span><br><span class="line">    if(num&lt;10)</span><br><span class="line">    return &apos;0&apos;+num</span><br><span class="line">    else</span><br><span class="line">    return num+&apos;&apos;</span><br><span class="line">&#125;</span><br><span class="line">var lastSeconds=$(&apos;#seconds&apos;).val();//获取到结束日期（这里单位是秒）</span><br><span class="line">var timeAdd=0;</span><br><span class="line">var interval=1000;</span><br><span class="line">function leftTimer()&#123;</span><br><span class="line">    timeAdd=timeAdd+1;</span><br><span class="line">    var leftTime=lastSeconds - timeAdd;//减少后的时间</span><br><span class="line">    if(leftTime&gt;=0)&#123;</span><br><span class="line">            var days=parseInt(leftTime/60/60/24,10);//天</span><br><span class="line">            var hours=parseInt(leftTime/60/60%24,10);//小时</span><br><span class="line">            var minutes =parseInt(leftTime/60%60,10);//分钟</span><br><span class="line">            var seconds =parseInt(leftTime%60,10);//秒</span><br><span class="line">            days = formatTime(days);</span><br><span class="line">            hours = formatTime(hours);</span><br><span class="line">            minutes = formatTime(minutes);</span><br><span class="line">            seconds = formatTime(seconds);</span><br><span class="line">            $(&apos;#timer&apos;).text(days+&quot;天&quot; + hours+&quot;小时&quot; + minutes+&quot;分&quot;+seconds+&quot;秒&quot;);</span><br><span class="line">        &#125;else&#123;</span><br><span class="line">        //如果时间到期，do something...</span><br><span class="line">            $(&apos;#btn-refund&apos;).attr(&apos;disabled&apos;,&quot;true&quot;).css(&#123;&apos;pointer-events&apos;:&apos;none&apos;,&apos;background-color&apos;:&apos;#dddddd&apos;&#125;);//添加disabled属性，禁用按钮</span><br><span class="line">            return false;</span><br><span class="line">        &#125;</span><br><span class="line">&#125;</span><br><span class="line">window.setInterval(function()&#123;leftTimer();&#125;, interval);</span><br></pre></td></tr></table></figure>
      
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                      while ((position = text.indexOf(word, startPosition)) > -1) {
                        index.push({position: position, word: word});
                        startPosition = position + wordLen;
                      }
                      return index;
                    }

                    indexOfTitle = indexOfTitle.concat(getIndexByWord(keyword, titleInLowerCase, false));
                    indexOfContent = indexOfContent.concat(getIndexByWord(keyword, contentInLowerCase, false));
                  });
                  if (indexOfTitle.length > 0 || indexOfContent.length > 0) {
                    isMatch = true;
                    hitCount = indexOfTitle.length + indexOfContent.length;
                  }
                }

                // show search results

                if (isMatch) {
                  // sort index by position of keyword

                  [indexOfTitle, indexOfContent].forEach(function (index) {
                    index.sort(function (itemLeft, itemRight) {
                      if (itemRight.position !== itemLeft.position) {
                        return itemRight.position - itemLeft.position;
                      } else {
                        return itemLeft.word.length - itemRight.word.length;
                      }
                    });
                  });

                  // merge hits into slices

                  function mergeIntoSlice(text, start, end, index) {
                    var item = index[index.length - 1];
                    var position = item.position;
                    var word = item.word;
                    var hits = [];
                    var searchTextCountInSlice = 0;
                    while (position + word.length <= end && index.length != 0) {
                      if (word === searchText) {
                        searchTextCountInSlice++;
                      }
                      hits.push({position: position, length: word.length});
                      var wordEnd = position + word.length;

                      // move to next position of hit

                      index.pop();
                      while (index.length != 0) {
                        item = index[index.length - 1];
                        position = item.position;
                        word = item.word;
                        if (wordEnd > position) {
                          index.pop();
                        } else {
                          break;
                        }
                      }
                    }
                    searchTextCount += searchTextCountInSlice;
                    return {
                      hits: hits,
                      start: start,
                      end: end,
                      searchTextCount: searchTextCountInSlice
                    };
                  }

                  var slicesOfTitle = [];
                  if (indexOfTitle.length != 0) {
                    slicesOfTitle.push(mergeIntoSlice(title, 0, title.length, indexOfTitle));
                  }

                  var slicesOfContent = [];
                  while (indexOfContent.length != 0) {
                    var item = indexOfContent[indexOfContent.length - 1];
                    var position = item.position;
                    var word = item.word;
                    // cut out 100 characters
                    var start = position - 20;
                    var end = position + 80;
                    if(start < 0){
                      start = 0;
                    }
                    if (end < position + word.length) {
                      end = position + word.length;
                    }
                    if(end > content.length){
                      end = content.length;
                    }
                    slicesOfContent.push(mergeIntoSlice(content, start, end, indexOfContent));
                  }

                  // sort slices in content by search text's count and hits' count

                  slicesOfContent.sort(function (sliceLeft, sliceRight) {
                    if (sliceLeft.searchTextCount !== sliceRight.searchTextCount) {
                      return sliceRight.searchTextCount - sliceLeft.searchTextCount;
                    } else if (sliceLeft.hits.length !== sliceRight.hits.length) {
                      return sliceRight.hits.length - sliceLeft.hits.length;
                    } else {
                      return sliceLeft.start - sliceRight.start;
                    }
                  });

                  // select top N slices in content

                  var upperBound = parseInt('1');
                  if (upperBound >= 0) {
                    slicesOfContent = slicesOfContent.slice(0, upperBound);
                  }

                  // highlight title and content

                  function highlightKeyword(text, slice) {
                    var result = '';
                    var prevEnd = slice.start;
                    slice.hits.forEach(function (hit) {
                      result += text.substring(prevEnd, hit.position);
                      var end = hit.position + hit.length;
                      result += '<b class="search-keyword">' + text.substring(hit.position, end) + '</b>';
                      prevEnd = end;
                    });
                    result += text.substring(prevEnd, slice.end);
                    return result;
                  }

                  var resultItem = '';

                  if (slicesOfTitle.length != 0) {
                    resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + highlightKeyword(title, slicesOfTitle[0]) + "</a>";
                  } else {
                    resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + title + "</a>";
                  }

                  slicesOfContent.forEach(function (slice) {
                    resultItem += "<a href='" + articleUrl + "'>" +
                      "<p class=\"search-result\">" + highlightKeyword(content, slice) +
                      "...</p>" + "</a>";
                  });

                  resultItem += "</li>";
                  resultItems.push({
                    item: resultItem,
                    searchTextCount: searchTextCount,
                    hitCount: hitCount,
                    id: resultItems.length
                  });
                }
              })
            };
            if (keywords.length === 1 && keywords[0] === "") {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-search fa-5x" /></div>'
            } else if (resultItems.length === 0) {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-frown-o fa-5x" /></div>'
            } else {
              resultItems.sort(function (resultLeft, resultRight) {
                if (resultLeft.searchTextCount !== resultRight.searchTextCount) {
                  return resultRight.searchTextCount - resultLeft.searchTextCount;
                } else if (resultLeft.hitCount !== resultRight.hitCount) {
                  return resultRight.hitCount - resultLeft.hitCount;
                } else {
                  return resultRight.id - resultLeft.id;
                }
              });
              var searchResultList = '<ul class=\"search-result-list\">';
              resultItems.forEach(function (result) {
                searchResultList += result.item;
              })
              searchResultList += "</ul>";
              resultContent.innerHTML = searchResultList;
            }
          }

          if ('auto' === 'auto') {
            input.addEventListener('input', inputEventFunction);
          } else {
            $('.search-icon').click(inputEventFunction);
            input.addEventListener('keypress', function (event) {
              if (event.keyCode === 13) {
                inputEventFunction();
              }
            });
          }

          // remove loading animation
          $(".local-search-pop-overlay").remove();
          $('body').css('overflow', '');

          proceedsearch();
        }
      });
    }

    // handle and trigger popup window;
    $('.popup-trigger').click(function(e) {
      e.stopPropagation();
      if (isfetched === false) {
        searchFunc(path, 'local-search-input', 'local-search-result');
      } else {
        proceedsearch();
      };
    });

    $('.popup-btn-close').click(onPopupClose);
    $('.popup').click(function(e){
      e.stopPropagation();
    });
    $(document).on('keyup', function (event) {
      var shouldDismissSearchPopup = event.which === 27 &&
        $('.search-popup').is(':visible');
      if (shouldDismissSearchPopup) {
        onPopupClose();
      }
    });
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